To read a complex story with different characters, raised in different obstacles and families, and expect only vanilla staff just because of one couple, than whine about how you hate everything else and demand what you want from the author is disgraceful. It leads to frustration and illness which may be the author's case. Shame on such readers!
I like the flight attendant, he is cute (except of the laugh). And I like Doyeon, he brought a spice to the story. The main couple is nice but their story started to run in circles.